{"product_id":"oem-lennox-heat-exchanger-assembly-88h73","title":"OEM Lennox Heat Exchanger Assembly — 88H73","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e88H73\u003c\/strong\u003e heat exchanger assembly — cross-referenced as R37801D002 — transfers combustion heat into your home's circulating air while maintaining a complete barrier against flue gases. Produced to original Lennox specifications, it matches the dimensions, alloy, and sealing construction of your furnace's factory component for a precise, reliable replacement.\u003c\/p\u003e\u003cp\u003eSigns that this assembly has failed include visible cracking or rust perforation, corrosion and soot in the burner compartment, a flame that flickers, shifts, or rolls out, unusual combustion odors, or activation of a carbon monoxide alarm. These symptoms involve combustion byproducts and call for prompt replacement.\u003c\/p\u003e\u003cp\u003eWhy OEM matters: with cross-referenced numbers like R37801D002, using the correct genuine \u003cstrong\u003e88H73\u003c\/strong\u003e guarantees you receive the current, properly specified revision rather than an ill-fitting substitute. Factory metallurgy and weld quality are what keep flue gases safely contained through years of thermal cycling, and they protect your furnace's efficiency rating and warranty. For a safe, code-compliant repair, install the authentic Lennox assembly.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081074196851,"sku":"LNX-88H73","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-88h73","provider":"National HVAC Parts","version":"1.0","type":"link"}